Hidden fire sprinkler

The utility model relates to the field of fire-fighting sprayers, in particular to a concealed fire-fighting sprayer which comprises a shell with an opening in the bottom, a water pipe connector communicated with the top of the shell, a cover covering the opening in the bottom of the shell and a water splashing disc slidably connected to the interior of the shell. A water blocking plug inserted into the water pipe connector in a sliding mode is arranged in the shell, a groove is formed in the circumferential wall of the water blocking plug, a protruding block clamped into the groove is fixedly connected to the inner wall of the water pipe connector, a driving block is fixedly connected to the end, located in the shell, of the water blocking plug, a chamfer is arranged at the top of the driving block, and the water blocking plug and the protruding block are fixedly connected to the inner wall of the water pipe connector. The top of the inner wall of the shell is slidably connected with a wedge-shaped block abu